Horse Chestnut
The short answer. There isn't much data on Horse Chestnut yet — 6 mentions, 2 with a clear outcome — so treat these numbers as anecdotal.
From 6 mentions in total — the rest didn't say how it went and aren't counted.
What Horse Chestnut does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“There's been an in vivo study or two on horse chestnut for treating male infertility resulting from varicocele. The positive results sync nicely with similar studies on other varicosities. Anyway, it worked for me (or I was okay enough that it didn't need to).”
“I used to take it with my lunch shake with coq10 but now I've moved it to my night stack to emulate the sleep stack. It definitely doesn't have adverse effects on my sleep though”
Other options for performance
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate